Is 11 a Prime Number

YES

11 is a prime number.

11 is not a composite number, it only has factor 1 and itself.

Prime Index of 11

Prime Numbe Index: 5 th
The 11 st prime number: 31
Hex format: B
Binary format: 0b1011

Check Numbers related to 11

12
13
14
15
16
17
18
19
20
21
11
111
211
311
411
511
611
711
811
911
110
111
112
113
114
115
116
117
118
119